Air conditioning system



July 12, 1949. 0, K 2,475,853

AIR CONDITIONING SYSTEM Filed Sept. 26, 1947 Olin/meg:

after to illustrate the same.

Patented July 12, 1949 AIR CONDITIONING SYSTEM I 6110!! Ottis Oaks, Summit, N. L, assignor, by

mesne assignments, to Thermal Liquids, Ina, New-York, N. Y., a, corporation of Delaware 26, 1941, Serial No. 776,319

Application September 1 Claim.

This invention relates to air conditioning and particularly to a heat transfer system for air conditioning. More particularly this invention relates to sucha system in which a particular class of chemical compounds is used as the heat transfer medium.

The particular class of chemical compounds for which this system is primarily intended is the tetra-aryl ortho silicates described in the Johnston Patent #2,335,0l2, dated November 23, 1943. As there described these compounds boil in the neighborhood of 725 F. and solidify in the neighborhood of '70 F. Within this temperature range these compounds provide a flexible and extremely efficient heat transfer medium.

Heretofore, various air conditioning devices have been proposed for cleaning, humidifying, de-humidifying, heating and cooling air but all of these require relatively large and expensive apparatus and are generally inefficient. Because of the characteristics of tetra-aryl ortho silicate I have been able to produce a novel system for air conditioning requiring simple and less bulky apparatus with greatly enhanced efficiency.

It is accordingly an object of the present invention to provide a novel system for conditioning air using a particular class of chemical compounds as the heat transfer medium.

Another object is to provide such a system using tetra-aryl ortho silicate as the heat transfer medium.

Another object is to provide such a system which is simple and compact, cheap and easy to build and more efiicient than existing systems.

An embodiment of my invention is shown in the accompanying drawing and is described here- This should in no way be construed as defining or limiting my invention and reference should be had to the appended claims for this purpose.

In the drawing any suitable air fan housing I is mounted upon a base I l, and discharges into a duct l2. The fan in housing I0 is not shown but may be of any suitable axial flow type mount ed upon shaft I3, journaled in housing in. Shaft I3 is driven by suitable means such as a pulley l4 driven by a suitable electric motor l5 through belt [6. Duct l2 connects with housing H which is provided with a conditioned air lead oil ducts I8 and'a suitable support l9. Housing ll carries an air filter of known type and coils 21 and 22.

Arranged in any suitable position with respect to the apparatus just described is a boiler 23 heated by coal, oil, gas, electricity or any other suitable means for heating the tetra-aryl ortho silicate used as the heat transfer Qmedlum. Heated tetra-aryl ortho silicate is taken from boiler 23 by pipe 24, an expansion tank25 being provided to allow for any expansionorcontraction of the tetra-aryl ortho silicate upon heating or cooling in the closed system of this invention. As a safety feature a suitable pressure and vacuum responsive relief valve 26 is supplied in the system and pre-set to open only underextreme conditions of pressure or vacuum. A pipe 2?, coupling 28, manually operable valve 29 and pipe 30 conduct the heated tetra-aryl ortho sillcate to a suitable thermostatically controlled valve. 3i

which communicates on one side with heating colls 22 and which communicates on its other side with a by-pass pipe 32. .Valve 3| is actuated by bulb 3 l located in the air flow from coils 22.. The outlet side of coil 22 and by-pass 32-.are connected to return pipe 33 which communicates with the intake side of pump 34. The exhaust side of pump 34 communicates with boiler 23 through pipe 35. Pump 34 is driven by motor l5, belt 36 and pulley 39. I e

Also arranged in any suitable position with respect to the rest of the system of my invention is any suitable absorption type refrigeration unit 37 having a generator 38 and designed to cool 'tetra-aryl ortho silicate contained in a storage tank or reservoir 39. Generator 38 is heated by the tetra-aryl ortho silicate supplied to pipe 2'! and is connected thereto through coupling 28, manually operable valve 40, thermostatically controlled valve .4| and pipe 42. The tetra-aryl ortho silicate passing through generator 38 is returned to boiler 23 by pipe 43 which connects with pipe at 44. A by-pass 45 leads from valve 4| to return pipe 35. Thermostatically controlled valve 4| is activated in the conventional way by bulb 46 connected thereto by tube 46' responsive to temperatures in tank 39.

Cold tetra-aryl ortho silicate is taken from tank 39 through pipe 41 to coils 2i and is returned to tank 39 through pipe 48, pump 49 and pipe 53. Pump 49 is driven by motor l5 through belt 5i and pulley 52.

With the air conditioning system of my invention set up as above described, when it is desired to deliver warmed air to duct l8 furnace 23 is fired. valve 29 is opened and valve 4% is closed. Motor i5 is started which drives fan shaft l3 and its fan and actuates pump 34. Air is then forced through filter 20 and over coils 22 heated by the tetra-aryl ortho silicate from boiler 23, and is heated and passes to duct l8. Should the temperature of the air passing over bulb 3i increase beyond that for which valve 3| is pre-set valve 3| will be actuated and the hot tetra-aryl ortho silicate will be by-Dassed around coils 22 through y-pass 32 until such time as coils 22 cool and the temperature of the air passing over bulb 3| drops below that for which valve 3| is pre-set. At that time valve II will be actuated to permit flow of the heated tetra-aryl ortho silicate to coils 22.

When it is desired to deliver cooled air to duct l8, valve 2! is closed and valve 40 is opened admitting heated tetra-aryl ortho silicate to generator 38 of refrigerating unit 31. The tetra-aryl ortho silicate in reservoir 39 is cooled and circulated by pump 49 through coils 2|. Ailpassing over coils 2| is cooled and dehumidifled by condensation of its moisture content. Should the temperature of the tetra-aryl ortho silicateinreservoir 39 fall below that for which valve ll is preset, valve will be actuated by bulb 46 and the heated tetra-aryl ortho silicate by-passed around generator 38 through by-pass 45 until such time as the temperature of the tetra-aryl ortho silicate in reservoir 39 increases above that for which valve 4| is pre-set. Valve 4! is then actuated to re-admit heated tetra-aryl ortho silicate to generator 38.

When it is desired to dehumidify and heat air passing to duct l8, valves 29 and 40 are both opened and, as above described, the air is dried by condensation of its moisture content by passing over cold coils 2i and is then heated by passing over hot coils 22.

It will now be apparent that by the present invention I have provided a novel air conditioning system using a particular class of chemical'compounds, the tetra-aryl ortho silicates, as the heat transfer medium, which is simple, compact, cheap and easy to build and more efilcient than existing systems.

Changes to or modifications of this embodiment of my invention may now be suggested to those skilled in this art without departing from my inventive concept and reference should be had to the appended claim 0 determine the scope of my invention.

What is claimed is: In an air conditioning system employing tetrayl ortho silicate as the heat transfer medium, means for heating the heat transfer medium, absorptlon type means for cooling the heat transfer medium including a generator, a housing, coils in said housing, means for circulating air through said housing over said coils, means for connecting said heating means to one of said coils, means for connecting said cooling means to another 0! said coils, means for connecting said heating means to said generator of said cooling means, a thermostatically controlled by-pass means by-passing the heated heat transfer medium around the heated coils and responsive to the temperature oi'the air passing through the heated coils, thermostatically controlled by-pass means by-passing the heated heat transfer medium around said generator and responsive to the temperature 01' the cooled heat transfer medium, said means for connecting said heating means to one of said coils and said means for connecting said heating means to said generator of said cooling means forming a closed system including an expansion tank positioned above and adjacent to said heating means and connected to the supply side thereof, normally closed pressure and vacuum relief means connected to said expansion tank and a circulating pump for the heated heat transfer medium connected in said closed system adjacent the return side of said heating means.

ORION OT'I'IS OAKS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

